OARP Narrowband Imaging Catalog
  • Hα (current)
  • [SII]
  • [OIII]
  • About
  • Image

    NGC 6853

    Planetary Nebula

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    Image

    NGC 6888

    Wolf-Rayet Nebula

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    Image

    NGC 2359

    Wolf-Rayet Nebula

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    Image

    NGC 1976

    HII Region

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    Image

    NGC 650

    Planetary Nebula

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    Image

    NGC 1952

    Supernova Remnant

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    Image

    NGC 3587

    Planetary Nebula

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    Image

    NGC 6514

    HII Region

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    Image

    NGC 6523

    HII Region

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    Image

    NGC 6611

    HII Region

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    Image

    NGC 6618

    HII Region

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    Image

    NGC 1499

    HII Region

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    Image

    IC 434

    Dark Nebula

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    Image

    NGC 2237

    HII Region

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    Image

    Sh2 274

    Planetary Nebula

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    Image

    NGC 6720

    Planetary Nebula

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    Image

    NGC 6960

    Supernova Remnant

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    Image

    IC 5146

    HII Region

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    Image

    IC 5067

    HII Region

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    Image

    NGC 7635

    HII Region

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    Image

    NGC 7538

    HII Region

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    Image

    IC 2177

    HII Region

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  • Image

    NGC 6853

    Planetary Nebula

    View more
    Image

    NGC 6888

    Wolf-Rayet Nebula

    View more
    Image

    NGC 2359

    Wolf-Rayet Nebula

    View more
    Image

    NGC 1976

    HII Region

    View more
    Image

    NGC 1952

    Supernova Remnant

    View more
    Image

    NGC 6960

    Supernova Remnant

    View more
    Image

    IC 5146

    HII Region

    View more
    Image

    IC 5067

    HII Region

    View more
    Image

    NGC 7635

    HII Region

    View more
    Image

    NGC 7538

    HII Region

    View more
  • Image

    NGC 6853

    Planetary Nebula

    View more
    Image

    NGC 6888

    Wolf-Rayet Nebula

    View more
    Image

    NGC 2359

    Wolf-Rayet Nebula

    View more
    Image

    NGC 1976

    HII Region

    View more
    Image

    NGC 650

    Planetary Nebula

    View more
    Image

    Sh2 308

    Wolf-Rayet Nebula

    View more
    Image

    NGC 6960

    Supernova Remnant

    View more
    Image

    IC 5146

    HII Region

    View more

  • Hα

    Hydrogen-alpha (Hα) filter, central wavelength 656.3 nm and 3 nm bandwidth.

    [SII]

    [SII] filter of central wavelength 671.6 nm and 5 nm bandwidth.

    [OIII]

    [OIII] filter with central wavelength 500.7 nm and 3 nm bandwidth.

    The Observatory

    The observatory is an small astronomical facility located at 30 km of the Guadalajara city in Mexico, with an elevation of 1588m above sea level. The telescope consists of a 0.32 m reflector (Planewave CDK-12.5) mounted on a Paramount ME II, and SBIG STL-6303 CCD camera with a five position filter wheel.

    The sample

    There is a bunch of celestial objects known as emission nebulae, and their name arises from the fact that they are actually emitting their own light (as opposed to reflection nebulae, which shine by reflected starlight). The Orion Nebula, is one of the most common examples of emission nebula. Planetary nebulae are normally considered a separate class of objects than emission nebulae, since they represent a very different phenomenon (star death instead of star birth). Novae or Supernova remnants also fall into this category.

    The Catalog

    Narrowband filters are designed to capture specific wavelengths of light, specifically, emission nebulae, composed of gases that are emitting light. The atoms within the gas are being excited by energy from nearby stars (either the stars forming within the nebula, as in the Orion Nebula, or by the remnant of the dead central star in a planetary nebula). The energy imparted by the starlight causes electrons within the gas atoms to jump up to a higher atomic orbit.

    We use Astrodon Narrowband filters of 49.7 mm diameter and round type unmounted. The transmittance is guaranteed >90% at the emission line.

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